| Autor: |
Pate, Jacob M., Goryachev, Maxim, Chiao, Raymond Y., Sharping, Jay E., Tobar, Michael Edmund |
| Rok vydání: |
2020 |
| Předmět: |
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| Zdroj: |
Nat. Phys. (2020) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1038/s41567-020-0975-9 |
| Popis: |
The Casimir force was predicted in 1948 as a force arising between macroscopic bodies from the zero-point energy. At finite temperatures it has been shown that a thermal Casimir force exists due to thermal rather than zero-point energy and there are a growing number of experiments that characterise the effect at a range of temperatures and distances. Additionally, in the rapidly evolving field of cavity optomechanics there is an endeavor to manipulate phonons and enhance coherence. We demonstrate a new way to achieve this through the first observation of Casimir spring and dilution in macroscopic optomechanics, by coupling a metallic SiN membrane to a photonic re-entrant cavity. The attraction of the spatially-localised Casimir spring mimics a non-contacting boundary condition giving rise to increased strain and acoustic coherence through dissipation dilution. This work invents a new way to manipulate phonons via thermal photons leading to ``in situ'' reconfigurable mechanical states, to reduce loss mechanisms and to create new types of acoustic non-linearity -- all at room temperature. |
| Databáze: |
arXiv |
| Externí odkaz: |
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